Safety-lock for keyholes.



T. E. GOOD.

SAFETY LOOK FOR KEYHOLES.

APPLICATION FILED 13120.5, 1910.

1 22,474. Patented Apr. 9, 1912.

/NVENTOR ATTORNEY CDLUMBIA FLANOGRAPH CO.,WI\$HXNGTON D. c.

TITUS E. GOOD, OF BRUNNER, TEXAS.

SAFETY-LOCK FOB KEYI-IOLES.

Application filed December 5, 1910.

Specification of Letters Patent.

Patented Apr. 9, 1912.

Serial No. 595,696.

To all whom it may concern Be it known that I, TITUS E. Goon, a citizen of the United States, residing at Brunner, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Safety-Locks for Keyholes, of which the following is a specification.

My invention relates to new and useful improvements in safety locks for keyholes.

The object of the invention is to provide a device of the character described which may be inserted in the keyhole of the ordinary lock and securely locked therein and is useful in preventing the insertion of a skeleton key in, or the picking of, the ordinary lock.

With the above and other objects in view the invention has particular relation to certain novel features of construction and operation, an example of which is given in this specification and illustrated in the accompanying drawings, wherein Figure 1 is a sectional side elevation of the device shown in a locked position. Fig. 2 is a plan view of the key used for locking and unlocking the same. Fig. 3 is a sectional end view taken on the line aa of Fig. 1 showing the device in a locked position. Fig. 4 is an end view of the device. Fig. 5 is a sectional end view taken on the line b?) of Fig. 1. Fig. 6 is a sectional end view taken on the line aa of Fig. 1 but showing the device unlocked, and Fig. 7 is a plan view of the device showing the same inserted in the keyhole of a lock and locked therein.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 8 refers to a barrel which supports the operative mechanism of the device. This barrel is a cylindrical body, composed of some suitable metal and secured to the lower side thereof is a finger 9 which is arcuate in shape and whose free end carries a bearing 10 which, by reason of the arcuate shape of the fingers is axially alined relative to the barrel, as shown in Fig. 1.

The numeral 11 refers to an internal barrel which fits within one end of barrel 8 and is rotatable relatively thereto. This rotatable barrel is provided with an annular rib 12 which fits into a corresponding annular groove 13 provided in the inner wall of barrel 8 and said internal barrel is thus held in place but permitted to rotate in the external barrel. The barrel 11 is preferably, about one third as long as barrel 8 and provided with an outwardly extending shaft 14, which is integral therewith, and extends out along the axial line thereof and whose free end is journaled in bearing 10 of finger 9. The intermediate portion of this shaft carries a catch 15 which is designed to engage behind the lock plate 16 as shown in Fig. 7 and hold the device in the keyhole. In order to secure the catch in its locked position I have provided a dog 17, seated on spring 18, located in the recess 19 of finger 9 and projecting through aperture 20 of the outer barrel. When the inner barrel 11 is in the position it will occupy when the device is locked in the keyhole, the aperture 20 will register with the aperture 21 of the inner barrel 11 and thus the dog will be forced, by spring 18, through aperture 21 and lock said barrel 11 and shaft 1 1 against rotation, as shown in Fig. 1.

The numeral 22 refers to a key, with which the device is locked and unlocked. When in a locked posit-ion, as shown in Figs. 1, 3 and 7, the key is inserted through slot 23 of the rotatable thimble 24 and extends into the barrel 11 the inner end of the key protruding into the internal barrel and assuming the position shown in Fig. 3. The key is then turned in the direction indicated by the arrow in Fig. 3, the key pressing against the beveled side of dog 17 and forcing the same down until the key engages against studs 25 and 26, projecting inwardly from the walls of barrel 11, and turns said barrel together with shaft 1 1 and thus disengages catch 15 from behind lock plate 16, the mechanism then assuming the position shown in Fig. 6. The key is provided with notches in its sides, as shown in Fig. 2, which as the key is turned to unlock the device, engage over arcuate ribs 27, 28 and 29, the former two of which are carried on the wall of barrel 8 and the latter of which is carried within barrel 11, as shown in Fig. 1. The device may thus be removed from the keyhole by a pull on the key thereof.

When it is desired to lock the device, it is inserted into the keyhole and the key 22 turned in the direction indicated by the arrow in Fig. 6. The key engages against studs 30 and 31 of barrel 11 and turns said barrel until the aperture 21 registers with aperture 20 and dog 17 engages through the last named aperture and locks barrel 11 and catch 15 in the locked position, shown in Fig. 1.

lVhat I claim is 1. A device of the character described including a tubular casing and a rotatable barrel secured therein and rotatable independently thereof, a catch support extending from the barrel and rigid therewith, a catch integral with the support and extending laterally therefrom, a resiliently mounted looking dog seated in a recess carried by the casing and arranged to project through alined holes in the casing and barrel and lock the same rigidly together, a rotatable key Within the casing and projecting within the barrel and engaging with the barrel and looking dog, and arranged to simultaneously turn said barrel and depress the dog and disengage said dog from the barrel and ribs carried by the wall of said casing and barrel and disposed so as to engage with corresponding notches of said key and secure the key in the casing and barrel.

2. A device of the character described including a tubular casing and a rotatable barrel secured therein and rotatable independently thereof, a catch support extending from the barrel and rigid therewith, a catch integral With the support and extending laterally therefrom, a resiliently mounted locking dog seated in a recess carried by the casing and arranged to project through alined holes in the casing and barrel and lock the same rigidly together, and a rotatable key within the casing and projecting within the barrel and engaging with the barrel and locking dog, and arranged to si- TITUS E. GOOD.

WVitnesses:

CHAs. R. MANGER, EVA L. CATHEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

